License Networks

Author

cslovas

Harvester licenses in Maine

To focus on fishery access and harvester adaptability, we’ve removed indigenous licenses, non-residential, and post-harvest (i.e., processors, wholesalers, etc) from the data set.

License Code License Type
al Aquaculture license
cfc Commercial fishing crew
cfs Commercial fishing single
cpc Commercial pelagic and anadromous crew
cps Commercial pelagic and anadromous single
cs Commercial shellfish
csc Commercial shrimp crew
cso Commercial shellfish + 70
css Commercial shrimp single
csu Commercial shellfish under 18
e0 Elver dip net
e0c Elver dip net crew
e1 Elver 1 fyke net
e1c Elver 1 fyke net crew
e2 Elver 2 fyke net
e2c Elver 2 fyke net with crew
e6 Elver dip net 1 fyke net
e6c Elver dip net 1 fyke net crew
ep Eel pot
fhc Federal halibut crew
gc Green crab
la Lobster crab apprentice
lao Lobster crab apprentice + 70
lau Lobster crab apprentace under 18
lc1 Lobster crab class i
lc2 Lobster crab class ii
lc2o Lobster crab class ii + 70
lc3 Lobster crab class iii
lc3o Lobster crab class iii + 70
lco Lobster crab + 70
lcs Lobster crab student
lcu Lobster crab under 18
lnc Lobster crab non commerical
md Mussel dragger
menc Menhaden commercial
menr Menhaden non commercial
mh Mussel hand
mw Marine worm dealer
mwd Marine worm digging
ncs Scallop non commericial
nfhc Non federal halibut crew
nfhs Non federal halibut single
qm Quahog (mahogany)
scd Sea cucumber drag
sd Scallop dragger
sdi Scallop diver
sdt Scallop with tender
spt Spat
sub Sea urchin dragger
suh Sea urchin diver
sur Sea urchin raking
surf Surf clam boat
suwt Sea urchin with tender
sw Seaweed
sws Seaweed supplemental
vh Vibrio harvester

Total licenses issued

Number of license types issued per year

Time series of license holdings

Annual License Network Metrics

Degree Centrality

“The degree of a node is the number of other nodes that single node is connected to.

Important nodes tend to have more connections to other nodes. Highly connected nodes are interpreted to have high degree centrality.”

Betweeness

“[Betweenness] ranks the nodes based on the flow of connections through the network. Importance is demonstrated through high frequency of connection with multiple other nodes. Nodes with high levels of betweenness tend to serve as a bridge for multiple sets of other important nodes.” Source

Annual Network Plots

Density time series and network plots are available here